Summary
Power systems are undergoing significant transformation to integrate high penetration of variable renewable energy. This shift has introduced increasing complexity in maintaining grid stability. Grid operators are increasingly concerned about declining grid strength which critically impacts the grid’s ability to maintain stability under disturbances and effectively dampen oscillations. In the case of undamped oscillations or system instability, generators may lose synchronism and be disconnected, potentially triggering cascading failures and widespread blackouts within seconds. Consequently, there is growing demand from system operators for system security assessment in real-time operation.
Read more Read lessThis paper presents an online dynamic security assessment (DSA) approach that enables nearreal-time assessment of power system stability limits based on instantaneous system states, enhancing grid visibility to support proactive decision-making in the control room. The approach is based on a digital twin model of a power grid, which integrates both steady-state and dynamic models of system components. Real-time system states and topology updates obtained from the state estimator are leveraged as inputs to the digital twin model to enable fast and accurate simulation of system dynamics under various contingencies, fault scenarios, and loading conditions. This capability enables grid operators to proactively detect instability risks and implement preventive control strategies to ensure secure grid operation. In addition to the methodology and simulation results, this paper shares approaches for integrating online DSA into existing Supervisory Control and Data Acquisition (SCADA), Energy Management
System (EMS), and Wide Area Monitoring System (WAMS) in a national grid control room.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | C2_10103_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | France |
| Study committees | |
| File size | 1 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
TRAN Thai Anh - Applied Technical Systems JSC, Vietnam; NGUYEN The Anh - Vietnam PRP Corporation; VU Hau Ba - Applied Technical Systems JSC, Vietnam
Keywords
dynamic security assessment, grid inertia, sub-synchronous resonance, sub-synchronous oscillation, transient stability, voltage stability
